Crystal-to-HCSL Clock Synthesizer W/Spread Spectrum

NOTICE - The following device(s) are recommended alternatives:

The 841202-245 is a two output clock synthesizer optimized to generate low jitter with or without spread spectrum modulation. Spread type and amount can be configured via the SSC control pins. Using a 25MHz, 18pF parallel resonant crystal, the device will generate HCSL clocks at either 25MHz, 100MHz, 125MHz or 250MHz. The 841202-245 uses a low jitter VCO and is packaged in a 32-pin VFQFN package.


  • Two differential HCSL output pairs at: 100MHz, 125MHz or 250MHz
  • HCSL outputs can be terminated to drive LVDS loads up to 175MHz
  • 25MHz crystal interface
  • Supports the following output frequencies: 25MHz, 100MHz, 125MHz or 250MHz
  • VCO range: 250MHz - 700MHz
  • Supports SSC downspread at 0.05% and -0.75%, centerspread at ±0.25% and no spread options
  • Cycle-to-cycle jitter: 15ps (typical)
  • Period jitter, RMS: 2.5ps (typical)
  • Full 3.3V operating supply mode
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) packages

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
841202BK-245LF Obsolete NLG32P1 VFQFPN 32 C Yes Tray Availability
841202BK-245LFT Obsolete NLG32P1 VFQFPN 32 C Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS841202-245 Datasheet Datasheet PDF 325 KB May 19, 2016
PDN# : CQ-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB May 3, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016